Priming mechanism for explosive-engines.



J. H. DURNO.

PRIMING MECHANISM FOR EXPLOSIVE ENGINES.

APPLIGATION FILED OCT. 11 1911.

Patented Oct. 29, 1912.

2 BHBET8SHEET 1.

NU/ Menus J. H. DURNO.

PRIMING MECHANISM FOR EXPLOSIVE ENGINES.

2 1 9 1 9 2 .B 0 0 d B t H 9 t a P APPLICATION FILED 00111, 1911.

2 SHEETS-SHEET 2.

aaeaeis,

JOHN H. DURN' O, OF.ROCHESTER, NEW YORK.

PRIMIENG MECHANISM FOR EXPLOSIVE ENGINES.

Application ,filed October 11, 1911.

To all whom-it may concern:

Be it known that I, dorm H. Dunno, of

Rochester, m the county of Monroe and State of New York, have invented certain new and useful Improvements in Priming Mechanism for Explosive-Engines; and I {do hereby declare the following to be'a full, clear, and exact description of the same,

reference being had to the accompanying drawings, forming a part o-f-this specification, and to the reference-numerals marked thereon. v v a I The present invention relates to a priming mechanism for explosive engines, being especially designed for use in connection with that type not engine embodying a'plurality of cylindershaving valves or pet-cocks through which the fuel-oil, suchas gasolene, is introduced into the cylinders for the usual priming operation, and it has for its object, more particularly, to provide improved means for opening the pet-cocks and simultaneously forcing the fuel-oil into the cylinders.

To these and other ends the invention consists in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointediout in the claims at the end of the specification.

In the drawings: Figure 1 is a. plan view of a four cylinder engine equipped with a preferred embodiment of my invention; Fig. 2 is a side elevation of the same; Fig. 3

is a horizontal sectional view through the pump,-showing a portion of the supply and feed pipes, respectively; vFig. 4 is a vertical sectional view of one of the pet-cocks, and Fig. 5 is a sectional view on the .line a-a 4b of Fig. 1.

Similar, reference numerals throughout the several figures indicate the same parts. In the present embodiment, I have shown the invention as applied to an engine embodying the pylinders 1, each being provided with a controlling valve or pet-cock 2 The pet-cocks are suitably connected to a feed pipe 3 which is provided with a gray.- ity check valve' 4, for a purpose presently to be explained, and leads to a pump com- "prising the cylinder 5, piston 6, and piston rod 7.

Leading to the pump cylinder 5 is a fuel supply pipe 8. to which the fuel-oil, uch

as gasolene, is fed from the main tank, or

from the carburetor, the supply pipe 8 being Specification of Letters Patent.

Patented Oct.29,1912.

provided with the spring controlled'check valve 9 which prevents return of thefueloil when the pump is operated to force the Serial No. 654 ,l31.

. cocks are provided with crank arms 11, the

latter being suitably connected for simultaneous operation by means of the connecting rod.12. In order to make provision for actuating the connecting rod 12 from the piston rod 7, at certain stages in the movement of the latter, there-is afiorded, in the present embodiment, an arm or lever 13 carried by the connecting rod 12 and arranged to project into the path of the piston rod, the latter being provided With an extension 144 having a slot 15 adapted to be engaged by said lever or arm'13, whereby the latter is moved at the proper moment. provision of the check valve 4, the fuel-oil that may be within the feed pipe 3 is prevented from returning into the pump cylinder when the pump is operated to draw the oil from the supply pipe, as will be apparent.

In the operation of the device, the piston By the red is actuated, slightly, back and forth, to

force the fuel-oil from the supply pipe 8 into the feed pipe- 3, the movement of the piston rod for thir purpose not being suflb cient to engage the lever 13 on the connecting rod which actu ates the pet-cocks. When, however, the feed pipe Sis full, as can readily be determined by the amount of resistance offered to the movementof the piston, the piston rod is drawn outwardly of the cylinder tothe full limit of its movement, thus filling the cylinder with the fueloil, and at the same time moving the connecting r d 12 through the lever 13, and causing the several pet-cocks to be opened. The pis" on rod then moved in the opposite diiection, so as to force the fuel-oil tion, the lever 13 is reengaged, and the con- 1 nectirg rod 12 moved along whereby the pet-cocks are again closed when the piston has reached its innermost positi n a the end of the pump cylinder, tlir part then ready for asecond priming 0;

While l have described the invention a is 3: reference to a particulmembodiment. it will l a feed pipe leading to the pet-cocks, a supsupply pipe to the feed pipe, said pump including a piston ,rod having operative connection with the aforesaid connecting rod.

' 4. The combination with a plurality of cylinders and pet-cocksfor the cylinders, of a feed pipe leading to the pet-cocks, a supp P p engagement With each of the petrcocks, and a pump arranged to force liquid from the supply pipe to the feedpipe, said pump including a piston rod having operative connection with the aforesaid connecting rod, whereby the latter when the be understood that I am not limited to the precise construction and arrangement of parts shown, but may adopt various modificatio'ns without departing from the essential feature of the invention claimed herein.

1 claim as my invention:

1. The combination with a plurality of cylinders and pet-cocks for the cylinders, of a feed pipe leading to the pet-cocks, a sup ply pipe, and a pump arranged to force liquid from the supply pipe to the feed pipe, said pump having'operative connection with the pet-cocks.

2. The combination with a plurality of cylinders and pet-cocks for the cylinders, of a feed pipe leading to the pet-cocks, a supply pipe, and a pump arranged to force liquid from the supply "pipe to the feed pipe, saidpump including a piston rod, movement of the piston rod in one direction serving to open the pet-cocks and in the 0pposite direction to close the same.

3. The combination with a plurality of cylinders and pet-cocks for the cylinders, of

is actuated piston rod approaches the limiting points of its movement.

"cylinders andpet-cocks for the cylinders, of a feed pipe leading to the-pet-cocks, a supply pipe, a pump arranged to force liquid from the supply pipe to the feed pipe, and a single actuating means for simultaneously operating the pump and the aforesaid petcocks.

JOHN H. DURNO.

Witnesses:

. RUSSELL B. GRIFFITH,

H. E. S'ronnBnAKnR.

ply pipe, a connecting rod having operative engagement with each oi the pet-cocks, and a pump arranged to force liquid from the f Copies of this patent may be obtained tor five cents each, byaddressing the Commissioner of Patents,

. Washington, D. G.

a connecting rod having operative 5. The combination with a plurality of 

